In recent years, PPSU (Polyphenylsulfone) has become the gold standard for high-end baby bottles due to its lightweight, shatterproof, and BPA-free properties. However, many manufacturers face a critical production bottleneck: poor ink adhesion. Scales and decorative patterns frequently peel or flake off after undergoing repeated high-temperature boiling or steam sterilization by the end-user.
The molecular structure of PPSU is exceptionally dense, resulting in a surface that is incredibly smooth with very low surface tension. When conventional plastic inks are used, they fail to create a mechanical or chemical bond with the substrate. Consequently, the print cannot pass the "cross-hatch" test and inevitably fails under the thermal stress of sterilization.
To resolve this industry pain point, it is essential to utilize a specialized PPSU screen printing ink. Designed specifically for the unique surface energy of sulfone resins, this solution helps manufacturers overcome three major obstacles:
Don't let ink adhesion issues compromise your brand reputation or waste your production costs. Switching to a dedicated PPSU ink is the most effective way to ensure your products meet the high expectations of modern parents.
If you are currently struggling with ink durability or failing safety tests on your PPSU products, our technical team is ready to help. We provide customized printing guidance and free sampling services to help you achieve the perfect finish.
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